Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c13102bcf91397c1de0f8d44993888b52ab46113fbee0e05cfd336f1cfda339' 
  AND token = 'sx9lcgcCQyAFSnh9R8Dfz3rjF07fk4PX8Ox7FF3YX4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}